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edited Jan 20, 2021 at 4:33

ann marie cœur

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The neutrinoless double beta decay can only occur if $\dots$

In Wikipedia https://en.wikipedia.org/wiki/Neutrinoless_double_beta_decay#Overview

it says that

The neutrinoless double beta decay can only occur if

(1) the neutrino particle is Majorana, and

(2) there exists a right-handed component of the weak leptonic current, or

(3) the neutrino can change its handedness between emission and absorption (between the two W vertices), which is possible for a non-zero neutrino mass (for at least one of the neutrino species).

I agree with (1) and (3). However, I am not sure about (2).

question

My question is that what is the meaning of saying "(2) there exists a right-handed component of the weak leptonic current"?

My question is that what is the meaning of saying "(2) there exists a right-handed component of the weak leptonic current"?

In the usual standard model on the textbook, isnt that the $Z^0$ gauge boson current has components depending not only on the left-handed fermions but also the right-handed fermions [such as Peskin QFT book eq (20.80)]? So does the usual standard model count to satisfy the (2) already? Or is (2) asking more?

Since the conditional sentence must be chosen between (2) or (3), it seems that if we have (3), we do not require (2). However, are there examples where (2) is satisfied?

You can find the neutrinoless double beta decay figure here https://i.sstatic.net/gYMtY.png

The neutrinoless double beta decay can only occur if

In Wikipedia https://en.wikipedia.org/wiki/Neutrinoless_double_beta_decay#Overview

it says that

The neutrinoless double beta decay can only occur if

(1) the neutrino particle is Majorana, and

(2) there exists a right-handed component of the weak leptonic current, or

(3) the neutrino can change its handedness between emission and absorption (between the two W vertices), which is possible for a non-zero neutrino mass (for at least one of the neutrino species).

I agree with (1) and (3)

question

My question is that what is the meaning of saying "(2) there exists a right-handed component of the weak leptonic current"?

Since the conditional sentence must be chosen between (2) or (3), it seems that if we have (3), we do not require (2). However, are there examples where (2) is satisfied?

You can find the neutrinoless double beta decay figure here https://i.sstatic.net/gYMtY.png

The neutrinoless double beta decay can only occur if $\dots$

In Wikipedia https://en.wikipedia.org/wiki/Neutrinoless_double_beta_decay#Overview

it says that

The neutrinoless double beta decay can only occur if

(1) the neutrino particle is Majorana, and

(2) there exists a right-handed component of the weak leptonic current, or

(3) the neutrino can change its handedness between emission and absorption (between the two W vertices), which is possible for a non-zero neutrino mass (for at least one of the neutrino species).

I agree with (1) and (3). However, I am not sure about (2).

question

My question is that what is the meaning of saying "(2) there exists a right-handed component of the weak leptonic current"?

In the usual standard model on the textbook, isnt that the $Z^0$ gauge boson current has components depending not only on the left-handed fermions but also the right-handed fermions [such as Peskin QFT book eq (20.80)]? So does the usual standard model count to satisfy the (2) already? Or is (2) asking more?

Since the conditional sentence must be chosen between (2) or (3), it seems that if we have (3), we do not require (2). However, are there examples where (2) is satisfied?

You can find the neutrinoless double beta decay figure here https://i.sstatic.net/gYMtY.png

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asked Jan 20, 2021 at 4:21

ann marie cœur

4.4k
1
12
31

The neutrinoless double beta decay can only occur if

In Wikipedia https://en.wikipedia.org/wiki/Neutrinoless_double_beta_decay#Overview

it says that

The neutrinoless double beta decay can only occur if

(1) the neutrino particle is Majorana, and

(2) there exists a right-handed component of the weak leptonic current, or

(3) the neutrino can change its handedness between emission and absorption (between the two W vertices), which is possible for a non-zero neutrino mass (for at least one of the neutrino species).

I agree with (1) and (3)

question

My question is that what is the meaning of saying "(2) there exists a right-handed component of the weak leptonic current"?

Since the conditional sentence must be chosen between (2) or (3), it seems that if we have (3), we do not require (2). However, are there examples where (2) is satisfied?

You can find the neutrinoless double beta decay figure here https://i.sstatic.net/gYMtY.png